<template>
  <div class="login_container">
    <!-- 里面的登录盒子 -->
    <div class="login_box">
      <!-- 头部图片 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLiginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: "Login",
  data() {
    return {
      loginForm: {
        username: "admin",
        password: "123456",
      },
      // 表单验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          { min: 3, max: 10, message: "长度在 3 到 10个字符", trigger: "blur" },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: "请输入登录密码", trigger: "blur" },
          { min: 6, max: 12, message: "长度在 6到 12个字符", trigger: "blur" },
        ],
      },
    };
  },
  methods: {
    //点击重置按钮 表单重置
    // 通过给form加ref标记 获取表单数据
    resetLiginForm() {
      // console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      //表单的预验证
      this.$refs.loginFormRef.validate( async valid => {
        // console.log(valid);
        // 登录请求
        if (!valid) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        if (res.meta.status !== 200) return  this.$message.error("登陆失败")
        this.$message.success("登录成功")
        // 1.将登录成功之后的 token 保存到客户端
        // 2.token只应能在当前网页打开期间生效 所以 token 保存在 sessionStorage
        
            window.sessionStorage.setItem('token',res.data.token)
       // 3.通过编程式导航跳转页面
            this.$router.push('/home')
      });
    },
  },
};
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 3px;
  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    box-shadow: 0 0 10px #ddd;
    padding: 10px;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>